Bug#444980: udev not restarted after exiting runlevel 1

[Dmitry Bogatov]

[2019-01-11 14:34] KatolaZ <katolaz at freaknet.org>
> On Fri, Jan 11, 2019 at 12:36:36PM +0000, Dmitry Bogatov wrote:
> > 
> > [2019-01-08 14:32] Michael Biebl <biebl at debian.org>
> > > Am 08.01.19 um 13:37 schrieb Dmitry Bogatov:
> > > > 
> > > > control: tags -1 +moreinfo
> > > > 
> > > > Seems old discussion did not ended in solution. Let us try again.
> > > > 
> > > > Dear udev maintainers, did anything changed? Are there still problems
> > > > running /etc/init.d/udev from runlevel 1 (when udev daemon was killed)
> > > > manually by sysadmin to restart it?
> > > >
> > >
> > > That's not what this bug report is about.
> > > 
> > > It's about udev being killed when switching to runlevel 1 and not being
> > > restarted automatically when switching back to say runlevel 2.
> > >
> > > That issue is still valid today.
> > 
> > I understand. Perfect solution would be move udev script (or part, that
> > actually starts process/es) to stages (2 3 4 5)? Is it feasible today?
> > 
> 
> I don't think it is possible, since udev gets started in early boot,
> before filesystems are mounted, but I might be wrong.

Yes, I see, that `mountdefsubsys', `procps' and number of other declare
soft dependency (Should-Start:) on udev. Any idea, where can I find
reasoning, why it is so?